A popular phrase in the casting industry, short videos, and bullet comments is' industry jargon+contrast meme '. Copper needs to cry, iron needs to laugh "is not an idiom in ancient books, but a" listening to fire song "passed down orally by old craftsmen. It personifies the sound of the metal casting site, which comes from the most direct auditory experience before the furnace fire! Used to quickly determine the success or failure of a casting process!

1、 master recited these two sentences to judge the fire:

Copper crying "indicates that the temperature is just right, the gas runs fast, and the casting is dense; When the flowability of copper liquid is poor, the temperature is low, or the mold exhaust is not smooth, shrinkage holes and cold barriers will form before solidification, and the knocking sound will be "dull", as if copper is "crying". When the copper liquid is about to come out of the furnace, the surface will burst with a "plop, click" sound, thin and short, like sobbing, which is called "copper crying" in the jargon.

 "Iron Smile" prompt indicates that if you don't start pouring, you will overheat and the sand mold will be washed away. The iron mold (or iron casting) is cooled evenly, demolded smoothly, and the size is qualified. When struck, it makes a crisp "ding" sound, and the master says, "Iron laughed".

2、 Bring a touch of humanity:

Copper is soft, easy to crack and repair, like a girl who loves to cry; Iron hard, unbreakable but difficult to turn back, like a laughing man.In just eight simple words, the personality, warmth, and human thoughts of metal are all written into fireworks.

Casting copper and casting iron is not about who is better, but who is more suitable. Their respective advantages determine their irreplaceability in different scenarios!